CN103225711A - Position indication mechanism for valve electric device - Google Patents
Position indication mechanism for valve electric device Download PDFInfo
- Publication number
- CN103225711A CN103225711A CN2013101741270A CN201310174127A CN103225711A CN 103225711 A CN103225711 A CN 103225711A CN 2013101741270 A CN2013101741270 A CN 2013101741270A CN 201310174127 A CN201310174127 A CN 201310174127A CN 103225711 A CN103225711 A CN 103225711A
- Authority
- CN
- China
- Prior art keywords
- upper plate
- center
- gear
- fixed
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention provides a position indication mechanism for a valve electric device. The position indication mechanism comprises a lower plate, an upper plate, upright columns, an input shaft, a planet carrier, a fixed center gear, a rotary center gear series, a fixed planetary gear, a rotary planetary gear series and an indication device, wherein the indication device is arranged on the upper plate, the upper plate and the lower plate are supported and fixed by using the upright columns, the planet carrier, the fixed center gear, the rotary center gear series, the fixed planetary gear and the rotary planetary gear series are arranged between the upper plate and the lower plate, the fixed center gear is fixed on the upper plate, and the planet carrier comprises a large shaft, a small shaft, an upper swinging rod and a lower swinging rod. The indication mechanism has the advantages that the effects of simple structure, convenience in installation, adjustable transmission ratio and high output precision are achieved, change with the regulation of a transmission ratio is avoided and the like, and ensures that the transmission ratio is large in adjustable range and the transmission precision is high and constant by fully utilizing the characteristic that a WW type planet mechanism is large in transmission ratio change after the number of teeth is slightly regulated.
Description
Technical field
The present invention relates to a kind of position indicating device, relate in particular to a kind of electric device for valve position indicating device.
Background technique
Electric device for valve is the control apparatus of valve, is used to connect or cut off the equipment of medium, as water, and steam, oil and gas in running, need to understand the valve opening position, so that valve is accurately controlled.Different valves will be equipped with the Electric actuator of different drive ratios, for reducing manufacture cost, requiring same position indicating device to be installed in all can be in the opening state of several angle internal reaction valve on the Electric actuator of different drive ratios, angle requires less than 360o, be generally 340o, promptly require electric device for valve position indicating device velocity ratio adjustable.Since electric valve be in the process automatic control system crucial actuating equipment, therefore require electric device for valve to have higher control and pointing accuracy with position indicating device.
Electric device for valve commonly used at present is the multi-stage gear driving type with position indicating device, satisfy the demand of different drive ratios by the position of regulating main drive gear, but increase along with velocity ratio, effect gear quantity also increases thereupon, cause accumulating idle stroke and increase gradually, had a strong impact on control and the pointing accuracy of Electric actuator valve.The problems referred to above are the problems that should pay attention to and solve in the design of electric device for valve and production process.
Summary of the invention
The purpose of this invention is to provide a kind of electric device for valve is the multi-stage gear driving type with the existing electric device for valve commonly used of position indicating device solution with position indicating device, satisfy the demand of different drive ratios by the position of regulating main drive gear, but increase along with velocity ratio, effect gear quantity also increases thereupon, cause accumulating idle stroke and increase gradually, had a strong impact on Electric actuator the control of valve and the problem of pointing accuracy.
Technical solution of the present invention is:
A kind of electric device for valve position indicating device, comprise lower plate, upper plate, column, input shaft, planet carrier, the fixed center gear, center of rotation gear series, fixing planetary pinion, rotate planetary pinion series and indicating device, described upper plate is provided with indicating device, carry out support fixation by column between described upper plate and lower plate, described planet carrier, the fixed center gear, center of rotation gear series, fixing planetary pinion, rotating planetary pinion series all is located between described upper plate and lower plate, described fixed center gear is fixed on the upper plate, described planet carrier comprises macro-axis, little axle, upper pendulum bar and lower pendulum bar, described macro-axis passes upper plate successively, fixed center gear and center of rotation gear series, described macro-axis and upper plate, macro-axis and fixed center gear are and are rotationally connected, described macro-axis connects center of rotation gear series by long flat key, the two ends of described little axle connect upper pendulum bar and lower pendulum bar respectively, the middle part of described little axle is connected and fixed planetary pinion by short flat key successively, connect any the rotation planetary pinion that rotates in the planetary pinion series by first screw, described lower pendulum bar connects input shaft, and described indicating device is connected the end of macro-axis.
Further improve and be: described indicating device comprises disk, open indicator panel, close indicator panel and be used to indicate the pointer of valve opening position, and described pointer is connected the end of macro-axis, described disk, opens indicator panel and closes indicator panel and all be located on the upper plate.
Further improve and be: described open indicator panel and close indicator panel all by second screw on upper plate, described pointer passes through the 3rd screw on macro-axis.
Further improve and be: described upper plate is provided with and is used for fixing tapped hole one and the tapped hole two that closes indicator panel.Thereby can adjust the position of closing indicator panel, change the angle of opening between indicator panel and the pass indicator panel mark.
Further improve and be: it is the tapped hole two of 245o～340o that described upper plate is provided with tapped hole one and the pointer angles of display that the pointer angles of display is 150o～250o.
Further improve and be: described center of rotation gear series comprises some center of rotation gears, described rotation planetary pinion series comprises some rotation planetary pinions, described center of rotation gear and the planetary quantity of rotation equate and corresponding one by one respectively engagement that arbitrary described center of rotation gear is all identical with the planetary number of teeth sum of pairing rotation.
Further improve and be: described center of rotation gear and the planetary quantity of rotation are four.
Further improve and be: described lower plate is located in the control chamber of Electric actuator casing.
A kind of electric device for valve of the present invention position indicating device has simple in structurely, easy for installation, and velocity ratio is adjustable, and output accuracy is high and not with advantages such as the adjustment of velocity ratio change.This kind electric device for valve position indicating device, a rotation planetary pinion that rotates in the planetary pinion series is connected with little axle by first screw, with fixedly planetary pinion, fixed center gear and center of rotation gear are formed a standard WW type planetary gear mechanism jointly.Thereby by make the fixed center gear and fixedly planetary pinion keep the number of teeth constant, then by adjusting the center of rotation gear and the pairing rotation planetary pinion number of teeth, acquire different velocity ratios, made full use of WW type planetary mechanism and after adjusting the number of teeth slightly, promptly had characteristics, made that the velocity ratio adjustable extent is big, transmission accuracy is high and constant than the big speed ratio change.
This kind electric device for valve position indicating device, described central gear series and rotate arbitrary group of correspondence in the planetary pinion series the center of rotation gear all equate with rotation planetary pinion number of teeth sum, guaranteed that all rotate planetary center line on same axis, make complete machine structure simple, easy for installation.
When electric device for valve was worked, rotational travel was delivered to lower pendulum bar by input shaft, and lower pendulum bar drives little axle and rotates around macro-axis, and lower pendulum bar forms planet carrier with upper pendulum bar.As shown in Figure 4, rotate planetary pinion and be connected with little axle, with fixedly planetary pinion, fixed center gear and center of rotation gear are formed a standard WW type planetary gear mechanism jointly by first screw.The center of rotation gear drives macro-axis by long flat key and rotates, and shows the opening state that valve is current by being installed in the pointer on the macro-axis and being fixed on opening indicator panel and closing indicator panel on the upper plate.By adjusting the position of first screw on little axle, realize the WW type planetary gear mechanism of various combination, obtain different velocity ratios.Because in the transmission process, the quantity of effect gear is always a fixed number, makes transmission accuracy high and constant.
The invention has the beneficial effects as follows: a kind of electric device for valve of the present invention position indicating device, a rotation planetary pinion that rotates in the planetary pinion series is connected with little axle by first screw, with fixedly planetary pinion, fixed center gear and center of rotation gear are formed a standard WW type planetary gear mechanism jointly.Thereby by make the fixed center gear and fixedly planetary pinion keep the number of teeth constant, then by adjusting the center of rotation gear and the pairing rotation planetary pinion number of teeth, acquire different velocity ratios, made full use of WW type planetary mechanism and after adjusting the number of teeth slightly, promptly had characteristics, made that the velocity ratio adjustable extent is big, transmission accuracy is high and constant than the big speed ratio change.Because different velocity ratios is the WW type epicyclic transmission mechanism of a corresponding standard all the time, the position pointing accuracy can not change along with the increase of velocity ratio.In addition, promptly have than the big speed ratio change, make that the velocity ratio adjustable extent is big, transmission accuracy is high and constant because the number of teeth adjusts back WW Gear Planet Transmission slightly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the sectional view of the embodiment of the invention;
Fig. 3 is the structural representation of planet carrier in the embodiment of the invention;
Fig. 4 is Gear Planet Transmission structural representation in the embodiment of the invention;
Fig. 5 is the structural representation of central gear series and planetary pinion series in the embodiment of the invention;
Fig. 6 is the structural representation of indicating device in the embodiment of the invention
Wherein: 1-lower plate, 2-upper plate, 3-column, 4-input shaft, 5-fixed center gear, 6-center of rotation gear series, 7-is planetary pinion fixedly, and 8-rotates planetary pinion series, the 9-macro-axis, the little axle of 10-, 11-upper pendulum bar, 12-lower pendulum bar, the 13-pointer, the 14-disk, 15-opens indicator panel, and 16-closes indicator panel, the long flat key of 17-, the short flat key of 18-, 19-first screw, 20-second screw, 21-the 3rd screw, 22-tapped hole one, 23-tapped hole two;
61-center of rotation gear one, 62-center of rotation gear two, 63-center of rotation gear three, 64-center of rotation gear four;
81-rotates planetary pinion one, and 82-rotates planetary pinion two, and 83-rotates planetary pinion three, and 84-rotates planetary pinion four.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, present embodiment provides a kind of electric device for valve position indicating device, comprise lower plate 1, upper plate 2, column 3, input shaft 4, planet carrier, fixed center gear 5, center of rotation gear series 6, fixedly planetary pinion 7, rotate planetary pinion series 8 and indicating device, described upper plate 2 is provided with indicating device, 1 of described upper plate 2 and lower plate are carried out support fixation by column 3, described planet carrier, fixed center gear 5, center of rotation gear series 6, fixedly planetary pinion 7, rotate planetary pinion series 8 and all be located at 1 of described upper plate 2 and lower plate, described fixed center gear 5 is fixed on the upper plate 2, as shown in Figure 3, described planet carrier comprises macro-axis 9, little axle 10, upper pendulum bar 11 and lower pendulum bar 12, described macro-axis 9 passes upper plate 2 successively, fixed center gear 5 and center of rotation gear series 6, described macro-axis 9 and upper plate 2, macro-axis 9 is with fixed center gear 5 and is rotationally connected, described macro-axis 9 connects center of rotation gear series 6 by long flat key 17, the two ends of described little axle 10 connect upper pendulum bar 11 and lower pendulum bar 12 respectively, the middle part of described little axle 10 is connected and fixed planetary pinion 7 by short flat key 18 successively, connect any the rotation planetary pinion that rotates in the planetary pinion series 8 by first screw 19, described lower pendulum bar 12 connects input shaft 4, and described indicating device is connected the end of macro-axis 9.
As shown in Figure 6, described indicating device comprises disk 14, opens indicator panel 15, closes indicator panel 16 and is used to indicate the pointer 13 of valve opening position, described pointer 13 is connected the end of macro-axis 9, described disk 14, opens indicator panel 15 and closes indicator panel 16 and all be located on the upper plate 2.The described indicator panel 15 of opening all is fixed on the upper plate 2 by second screw 20 with pass indicator panel 16, before second screw 20 is tightened, can turn an angle around disk 14, is used for adjusting between the lane place of closing at valve opening.Described pointer 13 is fixed on the macro-axis 9 by the 3rd screw 21, makes things convenient for the initial position of regulating valve.Described upper plate 2 is provided with and is used for fixing tapped hole 1 and the tapped hole 2 23 that closes indicator panel 16.Thereby can adjust the position of closing indicator panel 16, change the angle of opening between indicator panel 15 and pass indicator panel 16 marks.It is the tapped hole 2 23 of 245o～340o that described upper plate 2 is provided with tapped hole 1 and pointer 13 angles of display that pointer 13 angles of display are 150o～250o.As shown in Figure 5, described center of rotation gear series 6 comprises four center of rotation gears, be respectively center of rotation gear 1, center of rotation gear 2 62, center of rotation gear 3 63, center of rotation gear four, described rotation planetary pinion series 8 comprises that four are rotated planetary pinion, be respectively and rotate planetary pinion 1, rotate planetary pinion 2 82, rotate planetary pinion 3 83, rotate planetary pinion 4 84, described center of rotation gear and the planetary quantity of rotation equate and corresponding one by one respectively engagement that arbitrary described center of rotation gear is all identical with the planetary number of teeth sum of pairing rotation.Lower plate 1 is fixed on the Electric actuator casing in the control chamber by certain means of fixation.
When electric device for valve was worked, rotational travel was delivered to lower pendulum bar 12 by input shaft 4, and lower pendulum bar 12 drives little axle 10 and rotates around macro-axis 9, and lower pendulum bar 12 forms planet carrier with upper pendulum bar 11.As shown in Figure 4, rotate planetary pinion and be connected with little axle 10, with fixedly planetary pinion 7, fixed center gear 5 and center of rotation gear are formed a standard WW type planetary gear mechanism jointly by first screw 19.The center of rotation gear drives macro-axis 9 by long flat key 17 and rotates, and shows the opening state that valve is current by being installed in the pointer 13 on the macro-axis 9 and being fixed on opening indicator panel 15 and closing indicator panel 16 on the upper plate 2.By adjusting the position of first screw 19 on little axle 10, realize the WW type planetary gear mechanism of various combination, obtain different velocity ratios.Because in the transmission process, the quantity of effect gear is always four, makes transmission accuracy high and constant.
Be provided with at upper plate 2 and be used for fixing tapped hole 1 and the tapped hole 2 23 that closes indicator panel 16, select velocity ratio according to customer requirements, and calculate the angle of closing that is opened to of valve, and then definite upper plate 2 which tapped hole are used for fixing and close indicator panel 16.Be illustrated:
Z
5=60，Z
7=30，
Z
61=61，Z
62=62，Z
63=64，Z
64=69，
Z
81=29，Z
82=28，Z
83=26，Z
84=21，
When being installed in, first screw 19 rotates on the planetary pinion four velocity ratio i=2.6;
When being installed in, first screw 19 rotates on the planetary pinion three velocity ratio i=5.3;
When being installed in, first screw 19 rotates on the planetary pinion two velocity ratio i=10.3;
When being installed in, first screw 19 rotates on the planetary pinion one velocity ratio i=20.3.
This kind electric device for valve position indicating device can meet the widespread usage requirement of electric device for valve near 2 times ratio velocity ratio is regulated.
When fixing second screw 20 that closes indicator panel 16 was connected with the tapped hole 1 of upper plate 2, position indicating device can angles of display be 150o～250o, when being connected with the tapped hole 2 23 of upper plate 2, can angles of display be 245o～340o.
If valve needs 8 circles to open or close fully, then select velocity ratio i=10.3, promptly select first screw 19 is installed on the rotation planetary pinion two, the angle of Push And Release requires to be 279.6o in the indicating device of position at this moment, 2 23 pairs of tapped holes selecting upper plate 2 are closed indicator panel 16 to be fixed, adjust the angle of closing indicator panel 16 after arriving closed position by operated valve then, tighten screw at last.
Claims (8)
1. electric device for valve position indicating device, it is characterized in that: comprise lower plate (1), upper plate (2), column (3), input shaft (4), planet carrier, fixed center gear (5), center of rotation gear series (6), fixing planetary pinion (7), rotate planetary pinion series (8) and indicating device, described upper plate (2) is provided with indicating device, carry out support fixation by column (3) between described upper plate (2) and lower plate (1), described planet carrier, fixed center gear (5), center of rotation gear series (6), fixing planetary pinion (7), rotating planetary pinion series (8) all is located between described upper plate (2) and lower plate (1), described fixed center gear (5) is fixed on the upper plate (2), described planet carrier comprises macro-axis (9), little axle (10), upper pendulum bar (11) and lower pendulum bar (12), described macro-axis (9) passes upper plate (2) successively, fixed center gear (5) and center of rotation gear series (6), described macro-axis (9) and upper plate (2), macro-axis (9) is with fixed center gear (5) and is rotationally connected, described macro-axis (9) connects center of rotation gear series (6) by long flat key (17), the two ends of described little axle (10) connect upper pendulum bar (11) and lower pendulum bar (12) respectively, the middle part of described little axle (10) is connected and fixed planetary pinion (7) by short flat key (18) successively, connect any the rotation planetary pinion that rotates in the planetary pinion series (8) by first screw (19), described lower pendulum bar (12) connects input shaft (4), and described indicating device is connected the end of macro-axis (9).
2. electric device for valve as claimed in claim 1 position indicating device, it is characterized in that: described indicating device comprises disk (14), opens indicator panel (15), closes indicator panel (16) and is used to indicate the pointer (13) of valve opening position, described pointer (13) is connected the end of macro-axis (9), described disk (14), opens indicator panel (15) and closes indicator panel (16) and all be located on the upper plate (2).
3. electric device for valve as claimed in claim 1 position indicating device, it is characterized in that: described open indicator panel (15) and close indicator panel (16) all be fixed on the upper plate (2) by second screw (20), described pointer (13) is fixed on the macro-axis (9) by the 3rd screw (21).
4. electric device for valve as claimed in claim 1 position indicating device is characterized in that: described upper plate (2) is provided with and is used for fixing tapped hole one (22) and the tapped hole two (23) that closes indicator panel (16).
5. electric device for valve as claimed in claim 4 position indicating device, it is characterized in that: it is the tapped hole two (23) of 245o～340o that described upper plate (2) is provided with tapped hole one (22) and pointer (13) angles of display that pointer (13) angles of display is 150o～250o.
6. as each described electric device for valve position indicating device of claim 1-5, it is characterized in that: described center of rotation gear series (6) comprises some center of rotation gears, described rotation planetary pinion series (8) comprises some rotation planetary pinions, described center of rotation gear and the planetary quantity of rotation equate and corresponding one by one respectively engagement that arbitrary described center of rotation gear is all identical with the planetary number of teeth sum of pairing rotation.
7. electric device for valve as claimed in claim 6 position indicating device is characterized in that: described center of rotation gear and rotate planetary quantity and be four.
8. as each described electric device for valve position indicating device of claim 1-5, it is characterized in that: described lower plate (1) is located in the control chamber of Electric actuator casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174127.0A CN103225711B (en) | 2013-05-13 | 2013-05-13 | position indication mechanism for valve electric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174127.0A CN103225711B (en) | 2013-05-13 | 2013-05-13 | position indication mechanism for valve electric device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103225711A true CN103225711A (en) | 2013-07-31 |
| CN103225711B CN103225711B (en) | 2014-10-22 |
Family
ID=48836272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310174127.0A Expired - Fee Related CN103225711B (en) | 2013-05-13 | 2013-05-13 | position indication mechanism for valve electric device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103225711B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976415A (en) * | 2015-05-24 | 2015-10-14 | 杨小平 | Movable indicating device for indicating turn-on or turn-off direction of liquefied gas bottle valve |
| CN106248065A (en) * | 2016-09-19 | 2016-12-21 | 北京机械设备研究所 | A kind of time vehicle launch after effect period and the method and system of range measurement |
| CN109505104A (en) * | 2018-11-29 | 2019-03-22 | 程章华 | A kind of automatic clothes hanger of rotatable swing arm of air dry bar angle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788079A (en) * | 2010-03-09 | 2010-07-28 | 广东联塑科技实业有限公司 | Method for controlling opening of rotating switch of temperature control valve |
| JP2012122582A (en) * | 2010-12-10 | 2012-06-28 | Azbil Corp | Planetary gear mechanism and actuator for valve |
| CN202392247U (en) * | 2011-12-28 | 2012-08-22 | 谭仲禧 | Driving device of butterfly valve |
| CN202510810U (en) * | 2012-03-14 | 2012-10-31 | 温州执控科技有限公司 | Novel electric actuator |
| CN203248808U (en) * | 2013-05-13 | 2013-10-23 | 中国能建集团装备有限公司南京技术中心 | Position indication mechanism used for power-driven valve device |
-
2013
- 2013-05-13 CN CN201310174127.0A patent/CN103225711B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788079A (en) * | 2010-03-09 | 2010-07-28 | 广东联塑科技实业有限公司 | Method for controlling opening of rotating switch of temperature control valve |
| JP2012122582A (en) * | 2010-12-10 | 2012-06-28 | Azbil Corp | Planetary gear mechanism and actuator for valve |
| CN202392247U (en) * | 2011-12-28 | 2012-08-22 | 谭仲禧 | Driving device of butterfly valve |
| CN202510810U (en) * | 2012-03-14 | 2012-10-31 | 温州执控科技有限公司 | Novel electric actuator |
| CN203248808U (en) * | 2013-05-13 | 2013-10-23 | 中国能建集团装备有限公司南京技术中心 | Position indication mechanism used for power-driven valve device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976415A (en) * | 2015-05-24 | 2015-10-14 | 杨小平 | Movable indicating device for indicating turn-on or turn-off direction of liquefied gas bottle valve |
| CN106248065A (en) * | 2016-09-19 | 2016-12-21 | 北京机械设备研究所 | A kind of time vehicle launch after effect period and the method and system of range measurement |
| CN109505104A (en) * | 2018-11-29 | 2019-03-22 | 程章华 | A kind of automatic clothes hanger of rotatable swing arm of air dry bar angle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103225711B (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103225711B (en) | position indication mechanism for valve electric device | |
| RU2009148795A (en) | TRANSMISSION WITH A CONTINUOUS SPEED CHANGE | |
| CN203203631U (en) | Rotation type high-grade pore plate throttling device | |
| CN203248808U (en) | Position indication mechanism used for power-driven valve device | |
| CN204901036U (en) | Non -rising -stem gate valve switching and aperture display device | |
| CN104454177A (en) | Throttle valve driven by direct-current motor | |
| CN205441925U (en) | Paper currency steering control mechanism | |
| CN101788079B (en) | Method for controlling opening of rotating switch of temperature control valve | |
| CN206861039U (en) | A kind of fine adjustment valve instruction device | |
| US2795235A (en) | Apparatus for automatic flow control in conduits | |
| CN203146998U (en) | Valve manual device with two-stage transmission of planet gears and cylindrical gear | |
| RU196554U1 (en) | FULL-ROTARY REMOVABLE ACTUATOR FOR PIPELINE FITTINGS | |
| CN102207184B (en) | Gear-type fine tuning mechanism | |
| US2910943A (en) | Automatic control for variable capacity pumps | |
| CN205630525U (en) | Movable workstation of fine control | |
| CN202252126U (en) | Concentrated control device for switching gas flow | |
| CN114308536B (en) | Stepless regulation type oil dispensing device | |
| CN2814067Y (en) | Electric device comprehensive controller for valve | |
| CN202746718U (en) | Electric valve control system | |
| US2724967A (en) | Change-over devices for flow meter arrangements with two measuring ranges | |
| CN201314838Y (en) | External precision regulator for volumetric flowmeter | |
| CN203546251U (en) | Differential speed-changing mechanism of auto-leveling device | |
| CN102519732B (en) | Angle regulating device | |
| CN201554931U (en) | Indicating device capable of adjusting opening angle scope | |
| CN201679927U (en) | Gear type fin-tuning mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190513 |